Software Engineer

Who you are

• We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you’re a close but not exact match with the description, we hope you’ll still consider applying
• This role is for engineers who enjoy building modern distributed systems, care about security and reliability, and want to have real impact across a large engineering organization
• You have 3+ years of experience building and operating cloud-native, distributed systems in production
• You are comfortable writing production-quality code in a language such as Python or Go
• You have hands-on experience with AWS (or a similar cloud provider) and understand managed services, networking, and IAM concepts
• You have experience working with containers and orchestration platforms such as Kubernetes
• You are comfortable owning services and features independently, while knowing when to ask for feedback or support
• You understand the fundamentals of scalable, multi-tenant architectures and secure system design
• You care about reliability, performance, observability, and security—not just shipping features
• You are comfortable participating in on-call and responding to production issues
• You communicate clearly, collaborate well, and enjoy working through technical problems as a team
• You regularly use modern developer tooling, including AI-powered tools, to improve productivity and code quality
• Experience building or integrating security-focused systems (e.g. secrets management, IAM, authn/z, policy enforcement)
• Familiarity with service meshes, API gateways, or zero-trust architectures
• Experience improving performance in distributed systems or debugging complex multi-service workflows

What the job involves

• The Infrastructure Security team makes it simple and easy for engineers to make secure choices while developing world-class software at high speed. Security is built in by default—seamless and effortless—making engineers’ lives better and Klaviyo more secure
• Our work sits at the intersection of security, infrastructure, and software engineering. We build cloud-native platforms and services that are reliable, secure, and performant at global scale, forming the foundation that Klaviyo engineers rely on every day
• As a Software Engineer on the Infrastructure Security team, you will build and operate the systems that help Klaviyo engineers ship secure software with confidence
• Design, build, and maintain cloud-native security services used across Klaviyo
• Own meaningful components and services end to end, from implementation through production operation
• Improve the availability, scalability, latency, and efficiency of infrastructure security systems
• Collaborate with senior engineers on system design and architecture, contributing ideas and technical solutions
• Identify performance, reliability, and security issues in distributed systems and drive improvements
• Work extensively with technologies such as Python, Golang, AWS, Kubernetes, Terraform, and modern data stores
• Participate actively in design reviews, code reviews, and whiteboarding sessions
• Contribute to operational excellence through monitoring, alerting, and incident response
• Participate in an on-call rotation with a focus on learning, prevention, and reducing operational toil
• Build tooling, automation, and documentation that improve developer experience and security posture
• Partner with product-facing and platform engineers to ship impactful, secure solutions

Benefits

• Private medical insurance
• Medical
• Dental
• Vision
• Lifestyle spending account
• Commuter benefits
• Modern Health - wellness platform
• Parental leave
• Company equity
• Employee stock purchase plan
• Health savings account (HSA)
• Flexible spending accounts (FSAs)
• Employee assistance program (EAP)
• 401(k) plan with company match
• Flexible paid time off (FPTO)
• 13 company holidays
• Paid parental bonding leave
• Medical, Dental, Vision
• Pension
• Financial coaching
• Life insurance
• Income protection
• Annual leave - up to 25 annual leave days
• 10 company holidays (8 bank holidays + 2 recharge days)
• Family leave
• Cycle to Work benefit
• Mental health benefits